mb/intel/emeraldlake2: Remove unused VBOOT option

Remove the commented VBOOT_VBNV_CMOS Kconfig option as well as VBOOT for
emeraldlake2.

BUG=b:235293589
TEST=none

Change-Id: Ie583dcf615573784c657b9d220ad417b05704150
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
diff --git a/src/mainboard/intel/emeraldlake2/Kconfig b/src/mainboard/intel/emeraldlake2/Kconfig
index 86fe98a..72ab43f 100644
--- a/src/mainboard/intel/emeraldlake2/Kconfig
+++ b/src/mainboard/intel/emeraldlake2/Kconfig
@@ -14,9 +14,6 @@
 	select HAVE_ME_BIN
 	#select MAINBOARD_HAS_CHROMEOS
 
-config VBOOT
-	#select VBOOT_VBNV_CMOS
-
 config MAINBOARD_DIR
 	default "intel/emeraldlake2"